Lighthouse Ruf Stuff by John Wisinski
Summary
The Lighthouse Service, created in 1789, became part of the Coast Guard in 1939. The tradition of ensuring the safe navigation of the seas that began with the running of lighthouses continues today. The Coast Guard maintains the "signposts" and "traffic signals"--more than 50,000 federal aids to navigation, including buoys, lighthouses, day beacons, and radio-navigation signals--on the nation's waterways.
The collection/dataset uses media from the world's largest public domain source Picryl.com. It is made in two steps - first manually picked, and then, found semi-automatically, with aid of image recognition, it comprises of more than 5,000 images. Everything in the collection is in the public domain, so there is no limitation on the dataset usage - educational, scientific, or commercial.
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